CN106240602B - A method of detection orbit occupancy - Google Patents
A method of detection orbit occupancy Download PDFInfo
- Publication number
- CN106240602B CN106240602B CN201610544178.1A CN201610544178A CN106240602B CN 106240602 B CN106240602 B CN 106240602B CN 201610544178 A CN201610544178 A CN 201610544178A CN 106240602 B CN106240602 B CN 106240602B
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- China
- Prior art keywords
- track
- conducting wire
- capacitance
- phase
- veneer
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L21/00—Station blocking between signal boxes in one yard
- B61L21/06—Vehicle-on-line indication; Monitoring locking and release of the route
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Train Traffic Observation, Control, And Security (AREA)
Abstract
The present invention relates to a kind of methods of detection orbit occupancy, which is characterized in that including：Track signal detects veneer and sends the primary sinusoid to track, and the primary sinusoid forms the second sine wave after the transmission unit decaying on the track；The track signal detection veneer receives second sine wave, and is compared with the first range of memory；When the phase of second sine wave and amplitude are in the first range, the track signal detects the unoccupied signal of veneer output track, when the phase of second sine wave and amplitude are outside the first range, the track signal detects veneer output track Seize ACK message.Bandpass filter parameter, amplitude-frequency and the frequency phase behaviour that the present invention is constituted using resonance principle are more stable, have preferable frequency-selecting effect, can effectively filter out interference.
Description
【Technical field】
The present invention relates to track detecting field more particularly to a kind of methods of detection orbit occupancy.
【Background technology】
In railway signal system, detection train is particularly significant to the occupancy situation of certain section track in real time, direct relation
To the safety work of driving and scheduling.The detection of orbit occupancy is generally realized that middle orbit is electric by track circuit relevant device
Road is generally made of rail, insulation joint, rail end bond wire, transmitting terminal and receiving terminal.When in section without vehicle, electric current is passed through from power supply
Rail flows through relay, makes the actuating of relay, to indicate the case where no vehicle occupies, that is, goes out clear state；When there is vehicle in section,
Electric current through rail change by axle return and without relay, make relay loss of excitation, to indicate occupy the case where.
By continuing to develop, there are many track circuits at present, including：AC power frequency track circuit, analog track circuit and
Digital coding type track circuit, domestic the most commonly used is single-rail 50Hz phase-sensitive track circuits, 25Hz phase-sensitive track circuits and ZPW-
2000 track circuits.By taking single-rail 50Hz phase-sensitive track circuits as an example, function is only the inspection of orbit occupancy and track integrality
It looks into, but its rail also undertakes the effect of negative traction current.This track circuit form substantially including：Power transmission end equipment and receiving end
Equipment, as shown in Figure 1.Wherein power transmission end equipment by sending end choke transformer, sending end power transformer, current-limiting resistance and melts
Disconnected device composition；Receiving end by receiving end choke transformer, receiving end power transformer, receiving end current-limiting resistance and fuse, connect
Receive the compositions such as transformer box and 50Hz phase-sensitive track circuits receiver, warning box.Power supply uses alternating current 220V/50Hz, 110V/
50Hz, DC power supply 24V, detection strain time are 0.4~0.6s.It will when the track circuit failure or track fracture
Track can be caused to execute relay to fall, to indicate that orbit occupancy or circuit are imperfect；Only when track circuit is complete, and
When phase difference and voltage between track power supply and local supply voltage are met the requirements, phase sensitivity receiver internal controller can just incite somebody to action
Track relay picks up, to indicate that track goes out clear situation.
Single-rail 50Hz phase-sensitive track circuits and 25Hz phase-sensitive track circuits are more common at home, but application conditions are severe
It carves, the external equipment needed is more and the big quality of volume is heavy, voltage and power consumption are also larger, application and maintenance cost are higher (mobile
To following), it is easy to be pulled the influence of current interference, does not meet the requirement of development trend.The execution relay of use also has
More disadvantage：Release factor is relatively low to be unfavorable for improving track circuit transmission performance；Mechanical structure easily causes showing for multiple spot card resistance
As preventing relay from reliably falling, cause a serious accident.In addition it can be produced when electric locomotive acceleration, deceleration or rising bow, drop bow
Raw larger 50Hz draws impulse disturbances, may cause relay malfunction, directly jeopardize traffic safety.
【Invention content】
To solve foregoing problems, the present invention proposes a kind of higher method of detection orbit occupancy of reliability,.
To reach foregoing purpose, the present invention adopts the following technical scheme that：A method of detection orbit occupancy, feature exist
In, including：
Track signal detects veneer and sends the primary sinusoid to track, and the primary sinusoid, which passes through, to be set on the track
The second sine wave is formed after transmission unit decaying；
The track signal detection veneer receives second sine wave, and is compared with the first range of memory；
When the phase of second sine wave and amplitude are in the first range, the track signal detection veneer exports rail
The unoccupied signal in road, when the phase of second sine wave and amplitude are outside the first range, the track signal detection is single
Plate output track Seize ACK message.
The first preferred embodiment of the present invention is that the track includes the first track and arranged side by side with first track second
Track, the transmission unit include the first conducting wire, the second conducting wire, the first capacitance；One end of first conducting wire and described first
Track connects, and the other end of first conducting wire is connect with second track；One end of second conducting wire and described first
Track connects, and the other end of second conducting wire is connect with second track；One end of first capacitance and described first
Track connects, and the other end of first capacitance is connect with second track；First capacitance is set to first conducting wire
And between second conducting wire.
The second preferred embodiment of the present invention is that the first output end of the track signal detection veneer is connected to described first
On the first track between conducting wire and the first capacitance, the second output terminal of the track signal detection veneer is connected to described first and leads
On the second track between line and the first capacitance；
First receiving terminal of the track signal detection veneer is connected to first between second conducting wire and the first capacitance
On track, the second receiving terminal of the track signal detection veneer is connected to the second rail between second conducting wire and the first capacitance
On road.
The present invention third preferred embodiment be：First capacitance is 1.2 to 12uF.
The present invention the 4th preferred embodiment be：The phase value of the described first ranging from primary sinusoid adds first phase model
It encloses.
The present invention can reach following technique effect：Required equipment is few：Track circuit constitute simply only need two short-circuiting bars and
One capacitance；Voltage and low in energy consumption：Using 24V power inverters at sinewave output；Strong antijamming capability：Utilize resonance principle structure
At bandpass filter parameter, amplitude-frequency and frequency phase behaviour it is more stable, have preferable frequency-selecting effect, interference can be effectively filtered out.
Availability is good：Parameter stability, and the otherness of different track circuit can also adjust by adjusting the first capacitance；Safety
It is high：Two safety relays are controlled by phase and amplitude, number and simulation DO, safety can be greatly improved, avoid passing
Serious consequence caused by relay failure of uniting.
These features and advantages of the present invention will the detailed exposure in following specific implementation mode, attached drawing.
【Description of the drawings】
Following further describes the present invention with reference to the drawings：
Fig. 1 is the Organization Chart of the detecting system of the embodiment of the present invention 1.
Fig. 2 is the bandpass filter model that 1 middle orbit of the embodiment of the present invention is constituted with transmission unit.
Fig. 3 is the functional block diagram of 1 middle orbit signal detection veneer of the embodiment of the present invention.
【Specific implementation mode】
The technical solution of the embodiment of the present invention is explained and illustrated with reference to the attached drawing of the embodiment of the present invention, but under
It states embodiment to be merely a preferred embodiment of the present invention, and not all.Based on the implementation example in the implementation mode, those skilled in the art
Obtained other embodiment without making creative work, belongs to protection scope of the present invention.
Embodiment 1.
With reference to figure 1, Fig. 2, Fig. 3, a method of detection orbit occupancy, including：
Track signal detects veneer and sends the primary sinusoid to track, and the primary sinusoid passes through the transmission unit being set on track
The second sine wave is formed after decaying；
Track signal detects veneer and receives the second sine wave, and is compared with the first range of memory；
When the phase of the second sine wave and amplitude are in the first range, it is not occupied that track signal detects veneer output track
With signal, when the phase of the second sine wave and amplitude are outside the first range, track signal detects veneer output track and occupies letter
Number.
Track includes the first track and second track arranged side by side with the first track, and transmission unit includes the first conducting wire N6, the
Two conducting wire N5, the first capacitance C1；One end of first conducting wire C1 is connect with the first track, the other end and the second rail of the first conducting wire N6
Road connects；One end of second conducting wire N5 is connect with the first track, and the other end of the second conducting wire N5 is connect with the second track；First electricity
The one end for holding C1 is connect with the first track, and the other end of the first capacitance C1 is connect with the second track；First capacitance C1 is set to first
Between conducting wire and the second conducting wire.
First output end P1 of track signal detection veneer is connected to the first rail between the first conducting wire N6 and the first capacitance C1
On road, the second output terminal P2 of track signal detection veneer is connected to the second track between the first conducting wire N6 and the first capacitance C1
On；First receiving terminal P4 of track signal detection veneer is connected on the first track between the second conducting wire N5 and the first capacitance C1,
Second receiving terminal P3 of track signal detection veneer is connected on the second track between the second conducting wire N5 and the first capacitance C1.
First capacitance C1 is preferably 3.2uF, 5.2uF, 5.6uF or 7.6uF.The phase range of first range is first sinusoidal
The phase value of wave adds first phase range, ranging from 80.9 ° to 81.5 ° of first phase.The amplitude range of the primary sinusoid be 8~
The amplitude range of 15V, the first range are 1.5V~0.6V.
Fig. 2, track inductor are 2.6uH/m, and resistance is 0.01 Ω/m, it is also contemplated that connects the influence of resistance.
Wherein L1, L2, L3 and L4 are the inductance of 3 meters of gapless lines (2N1, N2, N3,2N4 etc.), and L5 is the electricity of the first conducting wire N6
Sense, L6 are the inductance of the second conducting wire N5, and R1, R2, R3 and R4 are the resistance of 3 meters of gapless lines, and R6 is the resistance of the first conducting wire N6, R5
For the resistance of the second conducting wire N5, R7 is the first capacitance C1 installations and the resistance of itself.It needs to minimize installation point contact resistance
With short-circuit line resistance, wherein the capacitance of the first capacitance C1 can select such as 3.2uF, 5.2uF, 7.6uF, capacitance is bigger to be passed through
Frequency signal frequency it is lower, gain is smaller.
When the first capacitance C1 is 5.6uF, resonant frequency 21.8Khz, gain 10.8dB, when the frequency of the primary sinusoid
Gain is less than 7.8dB reduction 3dB when rate is less than 21.3KHz or is more than 22.5KHz, illustrates that the circuit has preferable bandpass filtering
Effect, other frequency signal amplitude attenuations are larger.
When primary sinusoid frequency is 21.8Khz, the second sine wave differs 80.9 ° to 81.5 ° with primary sinusoid phase,
Phase angle is larger to the susceptibility of frequency near the frequency range.Vehicle occupancy can be judged whether there is using this characteristic,
When send and receive signal phase difference 80.9 ° to 81.5 or so a certain range when, just think no train occupation.The two phases
Potential difference be codetermine circuit and external circumstances and processor processing time (intrinsic phase difference is subtracted after software initialization,
Think that phase difference is 0 °, second phase difference and first phase difference then think to occupy if it is greater than -60 °；It occupies out and needs phase clearly
Potential difference is less than -25 °).
Transmitting terminal peak-to-peak value range：8~15V, receiving terminal peak-to-peak value range 1.5V~0.6V：
Referring to Fig. 3, operating personnel can be arranged according to the knob and LED screen of " MCU display control modules " and obtain veneer
Running parameter.MCU display control modules adjust clock frequency module output by spi bus and are used as signal according to these parameters
It generates, the fundamental clock signal of filtering and control, and desired output is being adjusted just by I2C bus marco external impedance measurement modules
The frequency and amplitude of string wave, the sine wave and signal of desired output send processing and pass through output signal with sampling module feedback signal
Compare and be compared processing with control module to control the break-make of H-bridge circuit, processing and sampling module are sent eventually by signal
Transformer as the primary sinusoid.
Signal receives sampling preprocessing module by being returned after the transmission unit on track, by signal and is divided into two-way, and one
Road is output to filter, and another way is output to digital multi-channel switch；Be input to after the signal rectification of filter obtain amplitude level,
And compare acquisition phase level, amplitude and phase level as two-way mould with the expectation sine wave of external impedance measurement module output
Analog quantity DO come control relay control detection module output；Amplitude and phase are also sent to MCU display control modules and are used for making
Foundation is exported for two-way digital quantity DO.The same transmitting terminal of another way signal " electric current " and " voltage " signal pass through " signal path together
Selection and control process module " is input to " external impedance measurement module ", and the impedance measurements of these accesses are total by I2C together
Line is sent to " MCU display control modules " and exports another foundation as two-way digital quantity DO.
Relay is controlled controls two safety relays, safety relay with detection module according to two railway digitals, simulation DO
Safety whether realizing that the switching output of two kinds of dynamic square waves realizes that track circuit occupies by contact indicates.
Circuit essential implementation.
Sine wave inverter circuit：Mainly " H-bridge circuit " and " signal sends processing and sampling module ", by H bridge metal-oxide-semiconductors
Switch output is converted into sine wave signal by transformer and filter circuit；
Clock frequency module：It is constituted using having source crystal oscillator and DDS chips AD9835 and counter, frequency divider corresponding
Clock frequency, clock output are controlled by SPI by MCU.
Input signal filters and phase acquisition module：This partial circuit is by precise rectification circuit and phase-comparison circuit, filter
The chips such as similar LTC1264 may be used in wave device；It is the amplitude acquisition circuit of input signal, U66A and U66B constitute a typical case
Precise rectification circuit, amplitude voltage be equal to 0.45 times of sine wave virtual value.
Phase obtain circuit, with amplifier by desired sine wave and actually return by amplifier be made into square wave believe
Number, and it is compared to obtain the directly proportional square-wave signal of duty ratio same-phase difference by amplifier, phase difference is away from smaller square wave duty
Than smaller.
External impedance measurement module：Mainly there are AD5933 compositions, the sine wave that different frequency is generated according to MCU orders is believed
Number, amplitude is exported after being adjusted by amplifier U65A numbers and potentiometer AD5241 by amplifier U65B.
Output signal compares and control module：For generating the level signal of control H bridges, the sine wave of similar SPWM is realized
Inversion.Clock input is related with the control MOS switch period, is typically chosen 40 times of sine wave freuqencies；The phase that AD5933 chips generate
It hopes output waveform and actually enters waveform and compare by amplifier AD8052 (U58B), if reality output is more than desired output
Control two JK flip-flop 74HC73D of L make H bridges export negative level, and two are controlled if reality output is less than desired output
JK flip-flop makes H bridges export positive level, realizes that the output of sine wave controls by this " switch controls ".
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, is familiar with
The those skilled in the art should be understood that the present invention includes but not limited to attached drawing and interior described in specific implementation mode above
Hold.The modification of any function and structure principle without departing from the present invention is intended to be included in the range of claims.
Claims (4)
1. a kind of method of detection orbit occupancy, which is characterized in that including：
Track signal detects veneer and sends the primary sinusoid to track, and the primary sinusoid passes through the transmission being set on the track
The second sine wave is formed after unit decaying；
The track signal detection veneer receives second sine wave, and is compared with the first range of memory；
When the phase of second sine wave and amplitude are in the first range, the track signal detection veneer output track is not
Occupied signal, when the phase of second sine wave and amplitude are outside the first range, the track signal detection veneer is defeated
Errant Seize ACK message；
The track includes that the first track and second track arranged side by side with first track, the transmission unit are led including first
Line, the second conducting wire, the first capacitance；One end of first conducting wire is connect with first track, first conducting wire it is another
End is connect with second track；One end of second conducting wire is connect with first track, second conducting wire it is another
End is connect with second track；One end of first capacitance is connect with first track, first capacitance it is another
End is connect with second track；First capacitance is set between first conducting wire and second conducting wire.
2. a kind of method of detection orbit occupancy according to claim 1, it is characterised in that：
First output end of the track signal detection veneer is connected to the first track between first conducting wire and the first capacitance
On, the second output terminal of the track signal detection veneer is connected to the second track between first conducting wire and the first capacitance
On；
First receiving terminal of the track signal detection veneer is connected to the first track between second conducting wire and the first capacitance
On, the second receiving terminal of the track signal detection veneer is connected to the second track between second conducting wire and the first capacitance
On.
3. a kind of method of detection orbit occupancy according to claim 1, it is characterised in that：First capacitance be 1.2 to
12uF。
4. a kind of method of detection orbit occupancy according to claim 1, it is characterised in that：The phase model of first range
It encloses and adds first phase range for the phase value of the primary sinusoid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610544178.1A CN106240602B (en) | 2016-07-08 | 2016-07-08 | A method of detection orbit occupancy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610544178.1A CN106240602B (en) | 2016-07-08 | 2016-07-08 | A method of detection orbit occupancy |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106240602A CN106240602A (en) | 2016-12-21 |
| CN106240602B true CN106240602B (en) | 2018-10-23 |
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ID=57613096
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610544178.1A Active CN106240602B (en) | 2016-07-08 | 2016-07-08 | A method of detection orbit occupancy |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB826553A (en) * | 1955-11-03 | 1960-01-13 | Westinghouse Brake & Signal | Improvements relating to alternating current track circuits for railway signalling systems |
| US4188002A (en) * | 1978-10-23 | 1980-02-12 | Westinghouse Air Brake Company | Vital power varistor circuit for railroad signaling systems |
| US4535959A (en) * | 1982-08-02 | 1985-08-20 | American Standard Inc. | Vital solid state relay for railroad alternating current track circuits |
| DE3835206A1 (en) * | 1988-10-15 | 1990-04-19 | Standard Elektrik Lorenz Ag | Track circuit arrangement |
| CN201240392Y (en) * | 2008-07-17 | 2009-05-20 | 北京全路通信信号研究设计院 | High shunt sensitivity 25Hz phase detecting track circuit for electrified sections |
| CN201846353U (en) * | 2010-09-14 | 2011-05-25 | 南车南京浦镇车辆有限公司 | Signal modulation circuit and demodulation circuit of digital track circuit |
| CN103223958A (en) * | 2013-04-15 | 2013-07-31 | 北京灵众博通科技有限公司 | Approaching judging method for electric traction train |
| CN103278552A (en) * | 2013-05-10 | 2013-09-04 | 兰州交通大学 | Device for detecting conductivity interference resistance of rail circuit |
| CN204488824U (en) * | 2015-01-15 | 2015-07-22 | 山西省工业设备安装有限公司 | A kind of novel phase-sensitive track system |
-
2016
- 2016-07-08 CN CN201610544178.1A patent/CN106240602B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB826553A (en) * | 1955-11-03 | 1960-01-13 | Westinghouse Brake & Signal | Improvements relating to alternating current track circuits for railway signalling systems |
| US4188002A (en) * | 1978-10-23 | 1980-02-12 | Westinghouse Air Brake Company | Vital power varistor circuit for railroad signaling systems |
| US4535959A (en) * | 1982-08-02 | 1985-08-20 | American Standard Inc. | Vital solid state relay for railroad alternating current track circuits |
| DE3835206A1 (en) * | 1988-10-15 | 1990-04-19 | Standard Elektrik Lorenz Ag | Track circuit arrangement |
| CN201240392Y (en) * | 2008-07-17 | 2009-05-20 | 北京全路通信信号研究设计院 | High shunt sensitivity 25Hz phase detecting track circuit for electrified sections |
| CN201846353U (en) * | 2010-09-14 | 2011-05-25 | 南车南京浦镇车辆有限公司 | Signal modulation circuit and demodulation circuit of digital track circuit |
| CN103223958A (en) * | 2013-04-15 | 2013-07-31 | 北京灵众博通科技有限公司 | Approaching judging method for electric traction train |
| CN103278552A (en) * | 2013-05-10 | 2013-09-04 | 兰州交通大学 | Device for detecting conductivity interference resistance of rail circuit |
| CN204488824U (en) * | 2015-01-15 | 2015-07-22 | 山西省工业设备安装有限公司 | A kind of novel phase-sensitive track system |
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| Publication number | Publication date |
|---|---|
| CN106240602A (en) | 2016-12-21 |
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